Right now just the carb, no heat shield. I didn't have a big problem with my duals and the exhaust heat, and there is a TON more room for airflow back there now with just the single. Did a bit more filing to the exhaust manifold, and remade the special bolt I had to make to bolt this facker up. It fits quite well now .
Oh yeah...it runs too .
I can't really comment on the throttle response, because I'm running the mixture screws at 7 turns out (starting position is 1 turn out according to the Mikuni manual), so I need WAY bigger idles. Ignoring the slight lean bog, it revs up SUPER fast...almost faster than the duals did. If I can rig up the throttle cable, I'll have a better idea of the jets I'll need, right now here's the specs:
-32 chokes (I love low end grunt, plus...mikuni parts aren't exactly growing on trees anymore. I'll have the spare two 32s machined out to 34s if I have to)
-1.5 needle (have a 1.8 in case I need to up the fuel flow to the bowls)
-4psi fuel pressure (seems to run well at this, like my dells did)
-7 turns out on the mixture screws